RAM causes windows 7 to freeze?

My computer periodically freeze completely, not responding to any input. I have to hard shut down to get it working. It seems to happen more when i'm playing games, but happen regardless of what I'm doing eventually (I'm having to write this post a second time as a result)

I have a dell optiplex gx620. stock, except for the following upgrades I made:
2 sticks of Samsung 1GB 2Rx8 PC2-4200U-444-12-E3
Zotac GT218-ION 512MB videocard
585W psu

I am running stock win7 ultimate, no updates, and nvidia graphics driver 314.22

From what Ive read, I think it might be a problem with the voltage the RAM is receiving. can somebody tell me what voltage it should be, and how to change it?
Or maybe its just that the video card is not compatible.

Also, it used to bsod before I upgraded my psu from 305W, but hasnt happened since.
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  1. Have you updated your bios from dell?
  2. johnnyb105 said:
    Have you updated your bios from dell?


    No, I had not. I attempted to install the updated driver, only to be greeted by the error message. "Windows configuration error. An error was encountered trying to configure Windows to allow flashing"
    Also, the driver it is having me install, and the driver I currently have installed both read A11.

    Also, I just bsoded again.
  3. Do you have repair disks or the ones to reinstall your entire system again because it sounds as if your system is either corrupt or you got a bad power supply/
  4. johnnyb105 said:
    Do you have repair disks or the ones to reinstall your entire system again because it sounds as if your system is either corrupt or you got a bad power supply/


    I do, but I've already tried reinstalling. The problem still exists.
    As to my psu, I bought it literally yesterday, fresh from newegg. And the problem existed on my old psu
  5. what is the brand of the supply can you provide a link thanks
  6. Ok, I reinstalled win7, this time 32bit, and installed absolutely nothing on it, and it still freezes up. Even when I'm running without the graphics card. It must be a hardware problem.
  7. I tried 2 additional harddrives, in case my original was faulty, but the problem persists.
  8. Can somebody please help me out here? I've tried every possible solution I can think of, this is just beyond my ability to troubleshoot.
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